Single-lever faucet



FIG. 1 is a top, front, left-side perspective view of a single-lever faucet showing my new design;

FIG. 2 is a bottom-plan view thereof;

FIG. 3 is a top-plan view thereof;

FIG. 4 is a right side elevational view, the opposite side being a mirror image thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a rear view thereof. 

The ornamental design for a single-lever faucet, as shown. 